Bangalow Design

8/8/2019 Bangalow Design

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FACULTY OF ELECTRICAL ENGINEERINGFACULTY OF ELECTRICAL ENGINEERING

KEK 363KEK 363

PREPARED BY:

Nor Zafrilfitrie bin Alias 2001231028

Mohd Fairul Hazlie bin Daud 2000155182

Mohd Fadzly bin Abd. Fatah 2000154911


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1.1. INTRODUCTIONINTRODUCTION

The requirement of the regulations is all fundamental to design, and the standards require that the installation isThe requirement of the regulations is all fundamental to design, and the standards require that the installation issuitable for use and to be safe from danger.suitable for use and to be safe from danger.

2. Requirement:2. Requirement:

In order to design of electrical installation, we need to comply all the regulation with:In order to design of electrical installation, we need to comply all the regulation with:

StandardStandard WorkmanshipWorkmanship Protection against electric shockProtection against electric shock EarthingEarthing Cable sizeCable size Selection of equipmentSelection of equipment

It is now necessary to combine all of these requirement together, in order to commence design. To begin assessing theIt is now necessary to combine all of these requirement together, in order to commence design. To begin assessing therequirement of the installation , the initial procedure can be summarized as below:requirement of the installation , the initial procedure can be summarized as below:

The purpose of installationThe purpose of installation

The external influenceThe external influence The compatibility of its equipmentThe compatibility of its equipment Its maintainabilityIts maintainability


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From the assessment, further preliminary information could be obtained that would be important during the designFrom the assessment, further preliminary information could be obtained that would be important during the designstagestage

MAXIMUM DEMANDMAXIMUM DEMANDARRANGMENT OF LIVE CONDUCTORARRANGMENT OF LIVE CONDUCTOR

TYPE OF EARTHINGTYPE OF EARTHING

NATURE OF SUPPLYNATURE OF SUPPLY

INSTALLATION CIRCUIT ARRANGEMENTINSTALLATION CIRCUIT ARRANGEMENT

Maximum demandMaximum demand

A detailed schedule of all current using equipment should be prepared. This schedule should give details of theA detailed schedule of all current using equipment should be prepared. This schedule should give details of the

current required per phase in amps, to assist in cable sizing. All the data are given in the table in the ONS

ITEcurrent required per phase in amps, to assist in cable sizing. All the data are given in the table in the ONS

ITEGUIDE 16th EDITION and IEE WIRING REGULATION 16TH EDITION.GUIDE 16th EDITION and IEE WIRING REGULATION 16TH EDITION.

Arrangement of live conductor.

The schedule of equipment will provide information that will determine the number and type of liveconductors.

e.g. single phase two wire a.c. , 3 phase four wire a.c.

this information along with the maximum demand and the earthing requirement, provides the initial data withwhich to approach the electricity supplier or to either determine the on site transformer or generator size.


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EarthingThe earthing arrangements for the installation both external and internal need to be understood at

the beginning of the design process. Although it not necessary to know actual size yet, where thesupply authority have maximum standards, they should be known.

Basically it is one of the type of the system, the choice of this system also affect the type ofprotective devices that maybe consider.Installation Circuit Arrangements

Knowing the type of equipment that need in the electrical installation, the circuit arrangement can be begin.Regulation of 314-01-01 requires that every installation shall be divide into circuits as necessary to:

avoid danger in the event of the fault facilitate safe operation , inspection, testing and maintenanceThe Full Design Stage

From all the of the previous consideration, the next step in the design process is to go through all of theitems:

1. assessment of general characteristic:-maximum demand-supply detail

2. selection of protective devices

3. sizing of conductor4. earthing requirement5. faults level


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Data for calculation

To be able to calculate the data to produce an electrical design, details of equipment to be used within the installationhave to be obtained from the manufacturers. This information is required to calculate using the regulation that set by JKRand from the IEE On Site Guide 16th regulation. The information that to need to be calculated:- maximum demand of distribution system and final circuit requirement as well as approximating therequired supply.

-Earthing requirements and cable size-Conductor sizes dependent upon protective devices to be used, type of cables and method of installation-Characteristics of the installation such as temperature and other environmental requirements

-Statutory requirements such as fire alarm, emergency lighting ,e.t.c.Example:

To design the lighting requirement and electrical wiring system to a bungalow house taking a 3-phase 415v supply fromTNB, having following requirements:- 4 bedroom with attached bathroom

-1 living area on the first floor-1 living area at the ground floor-1 kitchen-1 covered car porchstaircase

design requirement:--lighting requirement-electrical schematic wiring

layout plan indicating position of switch-socket outlets, switches, lighting luminaries, fan, cooker points, air-condition ,e.t.c.


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for each room-1 fan point-1 air-condition point-13 ampere switch socket outlet

living area- lighting point- 13 ampere switch socket outlet

Kitchen-lighting points-cooker point

-13 ampere switch socket outletbathroom

- water heater points- lighting points

covered car porch-lighting point-13 ampere switch socket outlet


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solution:

For the ground floor:

nnoo

itemitem Maximum loadMaximum load DiversityDiversityfactorfactor

Estimated loadEstimated load

11 100W( chandelier) x 4100W( chandelier) x 4 100W x 4100W x 4 = 5.56 A= 5.56 A3 x 4153 x 415

66%66% 3.67A3.67A

22 1 x 36W fluorescent x 61 x 36W fluorescent x 6 1.8 x 50W x 61.8 x 50W x 6 = 0.75 A= 0.75 A 3 x 415 3 x 415

66%66% 0.5 A0.5 A

33 2hp air2hp air--condition x 2condition x 2 2 x 2 x 7462 x 2 x 746 =4.15 A=4.15 A3 x 4153 x 415

100%100% 4.15 A4.15 A

44 Water heater x 1Water heater x 1 2000W x 12000W x 1 = 2.78 A= 2.78 A3 x 4153 x 415

100%100% 2.78 A2.78 A

55 13A socket x 1013A socket x 10 2 socket in 1 circuit = 20A2 socket in 1 circuit = 20A4 additional socket =4 additional socket =4 x 20A = 80A4 x 20A = 80Atotal = 100Atotal = 100A

100% for the100% for thefirst circuit +first circuit +40% for40% forremainingremainingcircuitcircuit

For first circuitFor first circuit100% x 20A =100% x 20A =20A20Aremaining circuitremaining circuit==40% x 80A =40% x 80A =32A32Atotal =52Atotal =52A

66 Cooker point x 1Cooker point x 1 10 A10 A 10 A10 A

77 fan x 3fan x 3 3 x 1000W3 x 1000W= 4.17 A= 4.17 A 3 x 415 3 x 415

4.17 A4.17 A

TOTALTOTAL = 127.41A (3)= 127.41A (3) = 77.27A (3= 77.27A (3))


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For thefirst floor:

nnoo

ItemItem Maximum loadMaximum load DiversityDiversityfactorfactor

Estimated loadEstimated load

11 100W( chandelier) x 3100W( chandelier) x 3 100W x 3100W x 3 = 0.417= 0.4173 x 4153 x 415

66%66% 0.28 A0.28 A

22 1 x 36W fluorescent x 71 x 36W fluorescent x 7 50wx1.8x750wx1.8x7 = 0.876 A= 0.876 A3 x 4153 x 415

66%66% 0.58A0.58A

33 2hp air2hp air--condition x 3condition x 3 3 x 2 x 7463 x 2 x 746 = 6.23 A= 6.23 A3 x 4153 x 415

100%100% 6.23 A6.23 A

44 Water heater x 2Water heater x 2 2000W x 22000W x 2 = 5.56 A= 5.56 A3 x 4153 x 415

100%100% 5.56 A5.56 A

55 13A socket x 1013A socket x 10 2 socket in 1 circuit =2 socket in 1 circuit =20A20A4 additional socket =4 additional socket =4 x 20A = 80A4 x 20A = 80Atotal = 100Atotal = 100A

100% for100% forthe firstthe firstcircuit +circuit +40% for40% forremainingremainingcircuitcircuit

For first circuitFor first circuit100% x 20A = 20A100% x 20A = 20Aremaining circuit =remaining circuit =40% x 80A =32A40% x 80A =32Atotal =52Atotal =52A

66 1 kw fan x 41 kw fan x 4 1000W x 41000W x 4 =5.56 A=5.56 A 3 x 415 3 x 415

5.56 A5.56 A

TOTALTOTAL = 118.643 A ( 3= 118.643 A ( 3)) =70.21A (3=70.21A (3))


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For the ground floor

Total load, It = 77.27 A

@choose MCCB = 80 Aprotective devices : BS88type of cable : multicore pvc insulated cables non armouredmethod of installation : clipped directAmbient temperature: 30rCLength of cable: 45 meter

Refer to table 4c2 :Correction factor for ambient temperature, Ca =1.0

Group = 3+1

Refer to table 4b1Correction factor for group, Cg = 0.65

Iz = In .Ca x Cg

= 80 A .1.0 x 0.65

= 123.08 A

refer to table 4D4AIz = 123.08 A } 125 A

Conductor cross sectional area = 35 mm2Refer to table 4D4BVoltage drop (per amp per meter) = 1.10Voltage drop = 1.10(mV/a/m) x 77.27 x 45 m

= 3.824V

allowable voltage drop = 4% x 415= 8.7 V


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For the first floor

It = 70.21 A@choose MCCB = 80 Aprotective devices : BS88type of cable : multicore pvc insulated cables non armouredmethod of installation : clipped direct

Ambient temperature: 30rCLength of cable: 30 meterA

Refer to table 4c2 :Correction factor for ambient temperature, Ca =1.0

Group = 3+1Refer to table 4b1Correction factor for group, Cg = 0.65

Iz = In .Ca x Cg

= 80 A .1.0 x 0.65

= 123.08 A

refer to table 4D4AIz = 123.08 A } 125 A

Conductor cross sectional area = 35 mm2

Refer to table 4D4B

Voltage drop (per amp per meter) = 1.10Voltage drop = 1.10(mV/a/m) x 70.21 x 30 m

= 2.316 V

allowable voltage drop = 4% x 415= 8.7 V


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Design Load Factor at 0.8 (i.e 20 % spare)Estimated Electrical Loads

Types of load Estimated Load (w)

Lighting Point (incandescent Lamp) 100 W

18 W Fluorescent Lamp 25 W

36 W Fluorescent Lamp 50 W

Wall Fan point 60 W

Ceiling Fan Point 80 W

5 A s/s/o 100 W

13 A s/s/o 250 W

15 A s/s/o 500 W

Air-condition Point 2000 W

Instant Water Heater Point 2000 W

Storage Water Heater Point Rated Capacity of Heater

Type of Board Minimum Breaking Capacity (kA)

Main Switch Board (MSB) 43 kA

Sub Switch Board (SSB) 22 kA

Final Sub Circuit (FSC)/Distribution

Board (DB)

10 kA

Circuit Breaker Interruption Capacity


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MCB Rating (A) Cable PVC/PVC Copper

Conductor

Types of Loads

6 A 1.5mm2 10 nos lighting point or 10

nos of fan point

15 A 2.5 mm2 1 nos 13 A s/s/o

20 A 2.5 mm2

(radial circuit)

Up to 2 nos 13 A s/s/o

32 A 2.5 mm2

(ring circuit)


(Floor area 100 m2)

32 A 4.0 mm2

(radial circuit)


(radial)

20 A 4.0 mm2

(radial circuit)

1 nos 15 A s/s/o

32 A 6.0 mm2 Air-condition Point withDOL Starter

20 A 4.0 mm2 Water heater point c/w 10

mA current operated

RCCB

20 A 4.0 mm2 1 nos 20 A s/s/o

MCB Rating, Cable Sizing and Wiring Connection


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TABLE 4B1

Correction factors for groups of more than one circuit of single core cables, or more than one multicore cable

( to be applied to the corresponding current carrying capacity for a single circuit in Tables 4D1 to4D4, 4E1 to

4E4, 4F1 and 4F2, 4J1, 4K1 to, 4L1 to 4L4 )

CorrectionCorrection

factor(Cg)factor(Cg)

Referent method of installationReferent method of installation

( see table 4A )( see table 4A )Number of circuits or multicoreNumber of circuits or multicorecablescables

22 33 44 55 66 77 88 99 1010 1212 1414 1616 1818 2020

Enclosed (Method 3 or 4) orEnclosed (Method 3 or 4) orbunched and clipped direct to abunched and clipped direct to a

NonNon--metallic surfacemetallic surface 0.80.8 0.70.7 0.650.65 0.60.6 0.570.57 0.540.54 0.520.52 0.50.50.40.4

880.40.4

55 0.430.43 0.410.41 0.390.39 0.380.38

Single layer clippedSingle layer clipped

to a no metallicto a no metallicTouchingTouching

surface (Method 1)surface (Method 1) 0.850.85 0.790.79 0.750.75 0.730.73 0.720.72 0.720.72 0.710.71 0.70.7 -- -- -- -- -- --

SpacedSpaced 0.940.94 0.90.9 0.90.9 0.90.9 0.90.9 0.90.9 0.90.9 0.90.9 0.90.9 0.90.9 0.90.9 0.90.9 0.90.9 0.90.9

Single layer multicore onSingle layer multicore on

metal cable tray, verticalmetal cable tray, verticalTouchingTouching

or horizontal (Method 11)or horizontal (Method 11) 0.860.86 0.810.81 0.770.77 0.750.75 0.740.74 0.730.73 0.730.730.70.7

220.70.7

11 0.70.7 -- -- -- --

SpacedSpaced 0.910.91 0.890.89 0.880.88 0.870.87 0.870.87 -- -- -- -- -- -- -- -- --

Single layer singleSingle layer single--corecore

on perforate metal cableon perforate metal cableTouchingTouching

tray (Method 1)tray (Method 1) 0.90.9 0.850.85 -- -- -- -- -- -- -- -- -- -- -- --

SpacedSpaced 0.850.85 -- -- -- -- -- -- -- -- -- -- -- -- --

Single layer multicore touching onSingle layer multicore touching onladder supports (Method 13)ladder supports (Method 13) 0.860.86 0.820.82 0.80.8 0.790.79 0.780.78 0.780.78 0.780.78

0.70.777 -- -- -- -- -- --


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TABLE 4B2

Correction factors for mineral insulated cables installed on perforated tray,

( to be applied to the corresponding current carrying capacity for single

circuits for reference method 11 in table 4J1A )

Number Number of multicore cables or circuitTray Arrangement of cablesTray Arrangement of cables

Orientation of tray 1 2 3Orientation of tray 1 2 3 4 6 94 6 9

HorizontalHorizontal


VerticalVertical

VerticalVertical


VerticalVertical

Multiconductor cables touchingMulticonductor cables touching

Multiconductor cables spacedMulticonductor cables spaced++

++

Multiconductor cables touchingMulticonductor cables touching

Multiconductor cables spacedMulticonductor cables spaced ++++

Single conductor cables trefoilSingle conductor cables trefoil

separatedseparated

Single conductor cables trefoilSingle conductor cables trefoil

separatedseparated

11

11

11

11

11

11

1.01.0

1.01.0

1.01.0

1.01.0

1.01.0

1.01.0

0.900.90

1.001.00

0.900.90

0.900.90

1.001.00

0.900.90

0.800.80

1.001.00

0.800.80

0.900.90

0.950.95

0.900.90

0.800.80

0.950.95

0.750.75

0.900.90

0.750.75

0.900.90

0.750.75

0.850.85

0.750.75

--

0.700.70

--


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Ambient temperature ( C )Ambient temperature ( C )

Type of insulationType of insulationOperatingOperating

temperaturetemperature 2525 3030 3535 4040 4545 5050 5555 6060 6565 7070 7575 8080 8585

9900 9595

Rubber(flexible cables only)Rubber(flexible cables only)6060 00CC 1.041.04 11 0.960.96 0.910.91 0.870.87 0.790.79 0.560.56 -- -- -- -- -- -- -- --

General purpose pvcGeneral purpose pvc7070 00CC 1.031.03 11 0.970.97 0.940.94 0.910.91 0.870.87 0.840.84 0.690.69 0.480.48 -- -- -- -- -- --

PaperPaper8080 00CC 1.021.02 11 0.970.97 0.950.95 0.920.92 0.90.9 0.870.87 0.840.84 0.760.76 0.620.62 0.430.43 -- -- -- --

RubberRubber858500CC 1.021.02 11 0.970.97 0.950.95 0.930.93 0.910.91 0.880.88 0.860.86 0.830.83 0.710.71 0.580.58 0.410.41 -- -- --

Heat resisting pvcHeat resisting pvc

9090 00CC 1.031.03 11 0.970.97 0.940.94 0.910.91 0.870.87 0.840.84 0.80.8 0.760.76 0.720.72 0.680.68 0.630.63 0.490.49 -- --

ThermosettingThermosetting9090 00CC 1.021.02 11 0.980.98 0.950.95 0.930.93 0.910.91 0.890.89 0.870.87 0.850.85 0.790.79 0.690.69 0.560.56 0.390.39 -- --

Mineral: bare and exposedMineral: bare and exposed

to touch or pvc coveredto touch or pvc covered

7070 00C sheathC sheath 1.031.03 11 0.960.96 0.930.93 0.890.89 0.860.86 0.790.79 0.620.62 0.420.42 -- -- -- -- -- --

Bare and not exposed toBare and not exposed to

TouchTouch

105105 00C sheatC sheat 1.021.02 11 0.980.98 0.960.96 0.930.93 0.910.91 0.890.89 0.860.86 0.840.84 0.820.82 0.790.79 0.770.77 0.640.64

00..

55

55

0.40.4

33

TABLE 4C2

Correction factors for ambient temperature where the overload protective device is a semi-enclosed fuse to BS3036


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ConductoConductor crossr cross--sectionalsectional

areaarea

Refference method (clipped direct)Refference method (clipped direct) Refference Method 11Refference Method 11horizontal or verticalhorizontal or verticalreference method 13reference method 13

(on a perforated(on a perforatedcable tray ) orcable tray ) or( free air )( free air )

1 two1 two--core cable,core cable,singlesingle--phase a.c or d.cphase a.c or d.c

1 two core1 two core--cablecablethreethree--phase a.cphase a.c

1 two1 two--core cablecore cablesinglesingle--phase a.c or d.cphase a.c or d.c

1 three or four1 three or four--core cable threecore cable three--phase a.cphase a.c

mmmm22

1.51.5

2.52.5

446610101616

25253535

505070709595

120120150150185185240240300300

400400

(A)(A)2121

2828

3838494967678989

118118145145175175222222269269

310310356356405405476476547547

621621

( A )( A )1818

2525

3333424258587777

102102125125

151151192192231231

267267306306348348409409469469

540540

( A )( A )2222

3131

4141535372729797

128128157157190190241241291291

336336386386439439516516592592

683683

( A )( A )1919

2626

3535454562628383

110110135135163163207207251251

290290332332378378445445510510

590590

TABLE 4D4AMulticore armoured-insulated cables

( copper conductor)BS 6346


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TABLE 4D4B

(mV/A/m)2918117.34.42.8

(mV/A/m)25159.56.43.82.4

Conductor crossConductor cross--sectional areasectional area

(mm(mm22))1.51.52.52.5446610101616

TwoTwo--core cable,core cable,d.cd.c

(mV/A/m)(mV/A/m)2929181811117.37.34.44.42.82.8

TwoTwo--core cable ,single phasecore cable ,single phasea.ca.c

Three or Four cable threeThree or Four cable three--

Phase a.cPhase a.c

25253535505070709595120120150150185185240240300300400400

1.751.751.251.250.930.930.630.630.460.460.360.360.290.290.230.230.1850.18501.4501.450.41050.4105

rr1.751.751.251.250.930.930.630.630.470.470.380.380.300.300.250.250.1900.1900.1550.1550.1150.115

xx0.1700.1700.1650.1650.1650.1650.1600.1600.1550.1550.1550.1550.1550.1550.1500.1500.1500.1500.1450.1450.1450.145

zz1.751.751.251.250.940.940.650.650.500.500.410.410.340.340.290.290.240.240.210.210.1850.185

rr1.501.501.101.10

0.800.800.550.550.410.410.330.330.260.260.210.210.1650.1650.1350.1350.1000.100

xx0.1450.1450.1450.1450.1400.1401.401.400.1350.1350.1350.1350.1300.1300.1300.1300.1300.1300.1300.1300.1250.125

zz1.501.501.101.100.810.810.570.570.430.430.350.350.290.290.250.250.210.210.1850.1850.1600.160

Voltage dropperVoltage dropper(ampere per metre)(ampere per metre)


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A

C

A

C

GROUND FLOORGROUND FLOOR


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FIRST FLOOR PLANFIRST FLOOR PLAN


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SCHEMATIC DIAGRAMSCHEMATIC DIAGRAM


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